Experience unwavering visibility with TFXA(R) sights, radiating brightness whether it's day or night. Evolving from our award-winning Tritium + Fiber-Optic technology, TFX incorporates a sleek, snag-free design, a longer sight radius for superior targeting, and remarkable durability. The illuminating elements are protected within a virtually bombproof chemical and shock-resistant capsule, and the CNC-machined steel is finished with a tough, rust-resistant FORTRESS FINISH(TM).Fully protected TFOA(R) technology encapsulated in a virtually indestructible capsuleImpervious to oils, chemicals, cleaning solvents, and ultra-sonic cleaning processesUnmatched visibility in all shooting conditions 24/7Assembled in USA with quality Swiss tritium for maximum brightnessGlows in the dark - no batteries or light exposure requiredFront sight FOCUSa LOCK(TM) for fast and accurate shootingConcealed fiber cannot be seen by targetFORTRESS FINISH(TM) nitride protective coatingFits standard holsters